Corrosion Resistance of Molybdenum Nitride Modified Ti6Al4V Alloy in HCl Solution

• 作 者: FAN Ailan QIN Lin TIAN Linhai
• 机 构: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China
• 出 处: 武汉理工大学学报（材料科学版）（英文版）
• 发表日期: 2008年3期
• 关键词: Ti6Al4V Mo-N modified Ti6Al4V alloy corrosion performance

The Mo-N surface modified layer on Ti6Al4V alloy was obtained by the plasma surface alloying technique. The structure and composition of the Mo-N modified Ti6Al4V alloy were investigated by X-ray diffraction (XRD) and glow discharge optical emission spectroscopy (GDOES). The Mo-N modified layer contains Mo-N coating on subsurface and diffusion layers between the subsurface and substrate. The X-ray diffraction analysis of the Mo-N modified Ti6Al4V alloy reveals that the outmost surface of the Mo-N modified Ti6Al4V alloy is composed of phase Mo2N (fcc) and Mo2N (tetr). The electrochemical corrosion performance of the Mo-N modified Ti6Al4V alloy in 0.5mol/L HCl solution was investigated and compared with that of Ti6Al4V alloy. The chemical corrosion performance of the Mo-N modified Ti6Al4V alloy in boiling 37% HCl solution was investigated and compared with that of Ti6Al4V alloy. Results indicate that self-corroding electric potentials and corrosion-rate of the Mo-N modified Ti6Al4V alloy are higher than that of Ti6Al4V alloy in 0.5mol/L HCl solution. The corrosion-rate of the Mo-N modified Ti6Al4V alloy is lower than that of Ti6Al4V alloy in boiling 37% HCl solution.